Construction site of the Boulder Dam, now known as Hoover Dam. Marion electric drag line with 5 cubic yard capacity bucket loading gravel. Site Name: Hoover Dam (dam)
Boulder Dam (now called Hoover Dam) construction. Trucks hauling 2-cubic-yard buckets, bringing concrete from the mixing plant for invert lining. Site Name: Hoover Dam (dam)
Black and white image showing a downstream view of the Hoover Dam construction site from the lower slope of the upper cofferdam. The excavation for the base of the Nevada intake towers can be seen in the upper right. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
Workmen at the construction of Boulder Dam, now called Hoover Dam. Trimming jumbo used in scaling walls of diversion tunnels and removing projecting rock. Site Name: Hoover Dam (dam)
An image showing a bird's eye view of Hoover Dam and vehicles on its crest from the Nevada side. The name was officially changed from Boulder Dam to Hoover Dam in 1947.
An image showing a bird's eye view of Hoover Dam and vehicles on its crest from the Arizona side. The name was officially changed from Boulder Dam to Hoover Dam in 1947.